Fix cannot open log file when run with Rails project

lib/codacy/configuration.rb

@@ -21,11 +21,19 @@ def self.logger_to_stdout
     end
 
     def self.logger_to_file
-      log_filename = self.temp_dir + 'codacy-coverage_' + Date.today.to_s + '.log'
-      log_file = File.open(log_filename, 'a')
+      log_file_path = self.temp_dir + self.log_file_name
+      log_file = File.open(log_file_path, 'a')
       Logger.new(log_file)
     end
 
+    def self.log_file_name
+      today = Date.today
+      # rails overrides to_s method of Date class
+      # https://github.com/rails/rails/blob/master/activesupport/lib/active_support/core_ext/date/conversions.rb#L52
+      timestamp = today.respond_to?(:to_default_s) ? today.to_default_s : today.to_s
+      'codacy-coverage_' + timestamp + '.log'
+    end
+
     def self.temp_dir
       directory_name = Dir.tmpdir + "/codacy-coverage/"
       Dir.mkdir(directory_name) unless File.exists?(directory_name)

lib/codacy/git.rb

@@ -13,6 +13,11 @@ def self.commit_id
       commit
     end
 
+    def self.work_dir
+      work_dir = ENV['WORK_DIR'] || git_dir
+      work_dir
+    end
+
     def self.git_commit
       git("log -1 --pretty=format:'%H'")
     end

lib/codacy/parser.rb

@@ -2,7 +2,7 @@ module Codacy
   module Parser
 
     def self.parse_file(simplecov_result)
-      project_dir = Codacy::Git.git_dir
+      project_dir = Codacy::Git.work_dir
 
       logger.info("Parsing simplecov result to Codacy format...")
       logger.debug(simplecov_result.original_result)
@@ -36,4 +36,4 @@ def self.logger
       Codacy::Configuration.logger
     end
   end
-end
+end